code: def ddf_left_double(df_left):
      return dd.from_pandas(df_left, npartitions=2, sort=False)
  
imports: from __future__ import annotations
  import numpy
  import pandas
  import pytest
  import dask.dataframe
  from dask.dataframe._compat import PANDAS_GE_210
  from dask.dataframe.utils import assert_eq
label_desc: Use image node_id 10 for calling a global function with example usage: ddf_left_double(df_left) and returns: dd